Floor-dressing machine.



0. E. JOHNSON & E.;A. LONG. FLOOR DRESSING MAGHINE,

APPLICATION FILED NOV. 16, 1908.

Patented Oct. 5, 1909.

' after more fully UNITED STATES OFFICE.

OLIVER E. JOHNSON AND EBER A.

LONG, OF SOUTH BEND,

INDIANA, ASSIGNORS TO LONG DISTANCE TELEPHONE MANUFACTURING 00., OFSOUTH BEND, INDIANA, A

CORPORATION OF INDIANA.

FLOOR-DRESSING MACHINE.

Patented Oct. 5, 1909. Serial No. 462,907;

To all whom it may concern:

Be it known that we, OLIVER E. JOHNSON and EBER A. LONG, citizens of theUnited States, residing at South Bend, in the county of St. Joseph andState of Indiana, have invented certain new and useful Improvements inFloor-Dressing Machines, of which the following is a specification.

This invention relates to floor dressing machines.

One object of the invention is to provide a floor dressing machineembodying such char acteristics that its cutting or dressing blade maybe readily and quickly adjusted to dif ferent lateral positions andefiiciently controlled in its difierent positions.

Another object of the invention resides in the provision of a floordressing machine embodying means whereby the exact pressure desired uponthe dressing blade may be obtained, so as to provide for a uniformcutting or dressing of the floor or other place or material upon whichthe machine may be operated.

A still further object of the invention is to provide a handle for themachine so that it may oscillate vertically as the machine is drawntoward the operator for the purpose of not altering or effecting thedegree of pressure upon the dressing blade by the aforesaid pressuremeans.

With the above and other objects in View, the present invention consistsin the combination and arrangement of parts hereindescribed, illustratedin the accompanying drawings and particularly pointed out in theappended claims, it being understood that changes may be made in theform, proportion, size and minor details without departing from thespirit or sacri ficing any of the advantages of the invention.

In the drawings z-F igure 1 is a perspective view of the invention. Fig.2 is a side elevation, the pressure means being shown in full lines inone position and in dotted lines in another position, as is also thehandle and the operating blade of the ma chine. Fig. 3 is a top planView with parts broken away. Fig. at illustrates the blade clampingmeans separated from the machine.

Referring now more particularly to the accompanying drawings, thereference character 1 indicates the truck of the machine havingdepending sides a and a pair of longitudinally spaced sills b, and apreferably fiat top 0, the sides (4 extending above the flat top 0 toform guide rails (l upon which latter slides the pressure block 15. hispressure block may be held rigidly in its different positions upon theguide rails (Z by means of a screw 16 having its head 18 caring againstthe underside of the aforesaid spaced sills Z), with its body extendingupwardly between said sills and through the reduced inner end of thepressure block 15 upon which reduced end of the latter bears a thumb nut19 which cooperates with said bolt 16 and through which latter and thethumb nut it will be readily seen how the pressure block may be heldfirmly in its 'dif' ferent adjusted positions. There are graduationsindicated along one or both sides of the truck 1 for the purpose ofdetermining the adjustment of the pressure block 15.

J ournaled in the truck 1 in any suitable manner is the fulcrum roller2, and at the rear of the truck it Will be seen that the underside ofthe same is cut away, and the back of the undercut portion formed upon acurve 6 to correspond with the curvature of the rear end of the head 8,so that the latter may have pivotal movement to provide for a lateraladjustment of the cutting or dressing blade 13.

The head 8 is provided with downwardly and outwardly directed companionparts 7", each part having a grooved inner face adapted to receive theblade clamping members 12, each of which latter is preferably formedsemi-circular in cross section and between which the dressing blade 13is clamped, the inner edge of the blade 13 projecting beyond the members12 and into the space between the companion member f.

The dressing element 13 is first placed between the clamping members 12and then the clamping members 12 with the dressing element between themis forced longitudinally between the companion members f The clampingmembers 12 are then tightly forced against the dressing element 13through the instrumentality of the clamping bolts 14, and if desired,each clamping member 12 may be provided with one or more fingers 9adapted to bear against corresponding faces of the dressing element 13to provide for a substantial clamping of the dressing clement betweenthe members 12 and thereby overcome any tendency of a bending orbreaking or the dressing element.

To pro 'ide tor a lateral adjustment of the head 8 and consequently thedressing element 13, there is formed in the top 0 of the truck a pair ofslightly curved oppositely directed slots 10 through which are passedbolts 11 and which enter the head 8. By loosening these bolts .11 thelatter may be moved in either direction in their slots 10 and the head 8moved accordingly laterally of the machine upon its pivot bolt 9, asclearly indicated in dotted lines in Fig. 3. In order that the heads ofthe bolts 11 may not interfere with a sliding movement of the pressureblock 15, the underside of the latter is cut out, as clearly shown inFig. 1.

Formed at the forward end of the truck 1 is a pair of spaced ears 3,each having a curved slot at. These ears are adapted to receive theinner end of an operating handle 6, whose inner end is pivoted betweenthe ears 3 at the inner ends of the latter by means of a suitable pivot7.

Passed through. the inner end of the handle 6 and the curved slots 4 otthe cars 3 is a bolt 2', and upon this bolt i there is secured a nut 5,which latter is not adapted to bind tightly against the correspondingear 3 but is employed principally for the purpose of preventingdisplacement of the bolt 2'. If desired, the nut may bind tightlyagainst the corresponding ear 3 and thereby hold the handle (3 rigidlyin one position, but it is preferred that the nut be not torccd tightlyagainst said ear 3, so that the handle 6 may have free and easy upwardmovement vertically upon its pivot 7 so that as the machine is drawntoward the operator, the pressure by the operator upon the handle wouldnot effect or alter the degree of pressure upon the dressing elementincident to the weight of the pressure block 15. Thus the handle isarranged preferably so that it may oscillate vertically as the machineis drawn toward the operator, so as not to effect or alter the degree ofpressure upon the dressing element and whereby a machine is constructedthat will provide for a uniform out throughout. This uniformity indressing would not be the result it any downward pressure should beapplied to the handle with the handle not constructed and arranged forthe said vertical oscillating movement, because the rigidity of a fixedhandle would partly counterbalance the we' it of the pressure block 15it downward pr ure should be brought to bear upon the rigidly mountedhandle.

To prevent ..-the handle 6 falling downwardly beyond a certain point andto enable the machine to be tilted without lowering the handle to itslowest limit of movement there is provided in each ear 3 a screw theinner end of which engages the bolt By adjusting this screw j thedownward movement of the handle may be adjusted accordingly.

By virtue of the clamping members 12 being semi-circular in crosssection, they form practically a circle in cross section when assembledso that the dressing element 13 may be adjusted in the head 8 and heldin its ditl'erent adjusted positions, as will be apparent by referringto Fig. 2, by means of the screw bolts 1-l. The further the weight orpressure block 13 is placed beyond the fulcrum of the truck, that is,the axle 7r; of the roller 2, the greater will be the weight upon thedressing element.

hat is claimed is:-

1. In a floor dressing machine, truck whose body is cutaway in the rearto provide a shoulder, the shoulder being concaved transversely of thetruck, a dressing element head having one side convexed longitudinallyfor engagement with said concaved shoulder, a dressing element carriedby said head, the sides of the body of the truck extending above the topof the truck to form guideways, a pressure block adjustably mounted uponthe truck and whose side engages the inner faces of said guideways toprevent accidental lateral displacement of the block, and a handle forthe truck.

2. In a floor dressing machine, a wheeled truck provided with alongitudinal slot and whose body is cutaway in the rear to provide ashoulder, the shoulder being concaved transversely of the truck, adressing element head having a side convexed longitudinally and disposedadjacent said concaved shoulder, means permitting the head to beadjusted to shift its convened side in opposite directions on theconcaved shoulder, a dressing element carried by said head, the sides ofthe body of the truck extending above the top of the truck to formguideways, a pressure block adjustably mounted upon the truck and whosesides engage the inner faces of said guideways to prevent accidentallateral displacement of the block, and a bolt passed through the slot ofthe truck and the pressure block to hold the latter in its adjustedpositions upon the truck, and a handle for the truck.

3. In a floor dressing truck provided with a and whose body is cutawayin the rear to provide a shoulder, the shoulder being concavedtransversely of the truck, a dressing element head having a sideconvexed longitudinally and disposed adjacein said concaved shoulder,means permitting the head to be adjustel to shift its convexed side inmachine, a wheeled a wheeled longitudinal slot means operating 935,91153; opposite directions on the concaved shoulder, a dressing elementcarried by said head, a pressure block slidably mounted upon the truck,a bolt passed through the slot of the truck and the block to hold thelatter in different positions upon the truck, and a handle for thetruck.

4. In a floor dressing machine, a wheeled truck, whose body is cutawayat its rear under side to provide a shoulder, the shoulder beingconcaved, a dressing element ivotally mounted at the rear of the truckand provided with a conveXed side for slidable engagement with saidconcaved shoulder, a pair of clamping members fitted in said head andeach provided with a pair of fingers, a dressing element fitted betweensaid clamping members and engaged by said fingers, a pressure blockslidably mounted upon the truck, and a handle secured to the truck.

5. In a floor dressing machine, a wheeled truck whose body is cutaway atits rear underside to provide a shoulder, the shoulder being concavedtransversely of the truck, a dressing element head pivot-ally secured atthe rear of the truck and having a longitudinally conveXed side forslidable engagement with said concaved shoulder, means whereby the headmay be held in various positions upon its pivot, said head having spacedupper and lower portions, a pair of clamping members fitted between saidspaced portions of the head, a dressing element disposed be tween saidclamping members, means operating upon one of the clamping members toeffect a binding of the dressing element between them, a pressure blockadjustably mounted upon said truck, and a handle for the truck.

6. In a floor dressing machine, a wheeled truck whose body is cut awayin the rear to provide a shoulder, the shoulder being concavedtransversely of the truck, a dressing element head pivotally secured tothe truck and having a convexed side for slidable engagement with theconcaved shoulder, means whereby the head may be held in adjustedpositions upon its pivot, the head including spaced members, each beingprovided with a groove near its outer edge, a clamping member fitted ineach groove of each spaced portion of said head, a dressing elementdisposed between said clamping members and j projecting therebeyond intoand between the j inner portions of said spaced members,

upon the clamping members to hold the dressing element againstdisplacement, a pressure block adjustably mounted upon the truck, and ahandle for the truck.

7. In a floor dressing machine, a wheeled truck whose body is cut awayin the rear to provide a shoulder, the shoulder being con- J cavedtransversely of the truck, a dressing element head pivotally mountedupon the truck and provided with a convex side for slidable engagementwith said concaved shoulder, means for holding the head in adjustedpositions upon its pivot, said head including downwardly and outwardlyspaced portions, clamping members disposed between said spaced portionsof said head, a dressing element disposed between the clamping members,means whereby the clamping members and dressing element may be adjusted,a pressure block slidably mounted upon the truck, and a handle for thetruck.

8. In a floor dressing machine, a wheeled truck whose body is cut awayin the rear to provide a shoulder, the shoulder being concavedtransversely of the truck, a dressing element head pivotally mountedupon the truck and provided with a convex side for slidable engagementwith said concaved shoulder, said head including spaced portions eachprovided with a longitudinal groove, a clamping member semicircular incross section fitted in each groove of said spaced portions with eachclamping member provided with a finger, a dressing element disposedbetween said clamping members and extending inwardly therebeyond andbetween said spaced portions and engaged by the fingers of said clampingmembers, means whereby the clamping members and dressing element may beheld firmly in adjusted positions between said spaced portions of thehead, a pressure block slidably mounted upon the truck, and a handle forthe truck.

9. In a floor dressing machine, a wheeled truck provided with alongitudinal slot, a dressing element mounted at one end of said truck,an adjustable pressure block mounted upon the truck, a bolt passedthrough said slot and the block to lock the latter in differentpositions upon the truck, and a handle for the truck.

10. In a floor dressing machine, a wheeled truck, a dressing elementhead pivotally secured to the truck, said head having spaced upper andlower portions, clamping members fitted between said spaced portions, adressing element disposed between said clamping members, means operatingupon the clamping members to hold said members and the dressing elementagainst displacement, and a handle for the truck.

11. In a fioor dressing machine, a wheeled truck, a dressing elementhead pivotally secured to the truck, said head having spaced upper andlower portions, clamping members adjustably fitted between said spacedportions, a dressing element disposed between said clamping members,means operating upon the clamping members to hold the dressing elementagainst displacement, and a handle for the truck.

12. In a floor dressing machine, a Wheeled In testimony whereof We affiXour signatruck, a dressing element mounted at one tures, in presence oftwo witnesses. end thereof, a pressure block mounted upon OLIVER E.JOHNSON. .the truck, means permitting the adjustment EBER A. LONG.

and locking of said block'to obtain different \Vitnesses:

degrees or fixed pressure upon the dressmg GEORGE OL'rsoI-I,

element, and a handle for the truck. 1 Gr. M. OoLn.

